Functional ionic liquids for enhancement of Li-ion transfer: the effect of cation structure on the charge–discharge performance of the Li4Ti5O12 electrode

2016 ◽  
Vol 18 (7) ◽  
pp. 5139-5147 ◽  
Author(s):  
Masahiro Shimizu ◽  
Hiroyuki Usui ◽  
Hiroki Sakaguchi
Keyword(s):  
Ionic Liquids ◽  
Ion Transfer ◽  
Solvation Number ◽  
Raman Analysis ◽  
Discharge Performance ◽  
Li Ion ◽  
Charge Discharge

Raman analysis revealed the following: the PP1MEM cation weakens the interaction between Li ion and TFSA anions, and thereby diminishes the solvation number of TFSA anions (NTFSA 1.56) compared with that of PP16-TFSA (NTFSA 2.40).

scholarly journals Sustainable Anodes for Lithium- and Sodium-Ion Batteries Based on Coffee Ground-Derived Hard Carbon and Green Binders

Energies ◽  
2020 ◽  
Vol 13 (23) ◽  
pp. 6216
Author(s):  
Hamideh Darjazi ◽  
Antunes Staffolani ◽  
Leonardo Sbrascini ◽  
Luca Bottoni ◽  
Roberto Tossici ◽  
...  
Keyword(s):  
Food Waste ◽  
Anode Materials ◽  
Active Material ◽  
Added Value ◽  
Hard Carbon ◽  
Great Opportunity ◽  
Discharge Performance ◽  
Coffee Ground ◽  
Li Ion ◽  
Charge Discharge

The reuse and recycling of products, leading to the utilization of wastes as key resources in a closed loop, is a great opportunity for the market in terms of added value and reduced environmental impact. In this context, producing carbonaceous anode materials starting from raw materials derived from food waste appears to be a possible approach to enhance the overall sustainability of the energy storage value chain, including Li-ion (LIBs) and Na-ion batteries (NIBs). In this framework, we show the behavior of anodes for LIBs and NIBs prepared with coffee ground-derived hard carbon as active material, combined with green binders such as Na-carboxymethyl cellulose (CMC), alginate (Alg), or polyacrylic acid (PAA). In order to evaluate the effect of the various binders on the charge/discharge performance, structural and electrochemical investigations are carried out. The electrochemical characterization reveals that the alginate-based anode, used for NIBs, delivers much enhanced charge/discharge performance and capacity retention. On the other hand, the use of the CMC-based electrode as LIBs anode delivers the best performance in terms of discharge capacity, while the PAA-based electrode shows enhanced cycling stability. As a result, the utilization of anode materials derived from an abundant food waste, in synergy with the use of green binders and formulations, appears to be a viable opportunity for the development of efficient and sustainable Li-ion and Na-ion batteries.

A Study on the Battery Parameter Testing Equipment

2011 ◽  
Vol 148-149 ◽  
pp. 67-70
Author(s):  
Feng Xiao ◽  
Liang Han ◽  
Xin Pan Chu ◽  
Jun Feng Xue ◽  
Qi Biao Chen ◽  
...  
Keyword(s):  
High Power ◽  
Formation Process ◽  
Testing Equipment ◽  
Active Materials ◽  
Discharge Performance ◽  
Power Battery ◽  
New Type ◽  
Li Ion ◽  
Charge Discharge

Li-ion power battery which has a broad prospect of application in many industry fields is a new type of high power battery. The formation is a key process in battery manufacture. After formation, the active materials of anode and cathode in the battery can be activated. Consequently, the charge-discharge performance, self-discharge performance, reserve performance and some other comprehensive performances can be improved. Only after formation can batteries achieve the best performance. With the change of formation process, the formation and holding for a single battery has been changed to for a group. Therefor, a new type of battery parameter testing equipment needs to be designed, which can test a group of batteries automatically. This paper will introduce the design of this equipment thoroughly.

scholarly journals Synthesis and Characterization of MnFe2O4 Nanoparticles and its Electrochemical Performance Evaluated as Anode for Li-ion Battery Applications

2019 ◽  
Vol 9 (2S2) ◽  
pp. 308-312
Keyword(s):  
Electrochemical Performance ◽  
Electrochemical Impedance ◽  
Impedance Analysis ◽  
Li Ion Battery ◽  
X Ray Diffraction ◽  
Solid State Method ◽  
Discharge Performance ◽  
Li Ion ◽  
Mnfe2o4 Nanoparticles ◽  
Charge Discharge

In the last decade, large number of research has been made to increase the capacity of anodes by changing the graphite with Si or Sn and conversion based materials such as MnFe2O4 , Co3O4 , Fe2O3 and NiO etc.,. In the present work, MnFe2O4 nanoparticles has synthesized by simple solid-state method. The crystal structure of MnFe2O4 evaluated by powder X-ray diffraction (XRD) and its morphology invetigated by Scanning Electron Microscopy (SEM), and its electrochemical performance has been carried out by Cyclic Voltammetry (CV), charge-discharge and electrochemical impedance analysis (EIS). The results of charge-discharge performance showed an excellent discharge capacity of 860 mA hg-1 when tested as anode for Li-ion battery applications.

Effect of Iron Source and Temperature on Charge/Discharge Performance of LiFePO4

2012 ◽  
Vol 509 ◽  
pp. 46-50
Author(s):  
Hong Quan Liu ◽  
Fei Xiang Hao ◽  
Feng Lin Yao ◽  
Yi Jie Gu ◽  
Yun Bo Chen
Keyword(s):  
Thermal Reduction ◽  
Ion Diffusion ◽  
Diffusion Distance ◽  
Sem Images ◽  
Discharge Performance ◽  
Positive Electrode Material ◽  
Li Ion ◽  
Pure Phases ◽  
Charge Discharge ◽  
Discharge Curves

LiFePO4 compound has been paid considerable attention as a promising positive electrode material. In this work, LiFePO4 compound was synthesized by the solid carbon thermal reduction reactions，where Fe2O3, Fe(OH)3 and FeSO4 is used as the iron resource respectively. All the synthesized products are pure phases except that using FeSO4 as the iron resource. The SEM images show porous morphologies, but different iron resource samples show different degree of pore ratio. According to the results of charge/discharge curves, capacity of the sample prepared by Fe(OH)3 as the iron resource shows superior to those of other samples. The result is attributed to more pores in the sample, which is benefit to electrolyte penetrating, short Li-ion diffusion distance.

scholarly journals Investigating the Proton and Ion Transfer Properties of Supported Ionic Liquid Membranes Prepared for Bioelectrochemical Applications Using Hydrophobic Imidazolium-Type Ionic Liquids

Membranes ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 359
Author(s):  
László Koók ◽  
Piroska Lajtai-Szabó ◽  
Péter Bakonyi ◽  
Katalin Bélafi-Bakó ◽  
Nándor Nemestóthy
Keyword(s):  
Mass Transfer ◽  
Ionic Liquid ◽  
Ionic Liquids ◽  
Microbial Fuel Cells ◽  
Transport Numbers ◽  
Liquid Membranes ◽  
Ion Transfer ◽  
Supported Ionic Liquid ◽  
Supported Ionic Liquid Membranes ◽  
Transfer Properties

Hydrophobic ionic liquids (IL) may offer a special electrolyte in the form of supported ionic liquid membranes (SILM) for microbial fuel cells (MFC) due to their advantageous mass transfer characteristics. In this work, the proton and ion transfer properties of SILMs made with IL containing imidazolium cation and [PF6]− and [NTf2]− anions were studied and compared to Nafion. It resulted that both ILs show better proton mass transfer and diffusion coefficient than Nafion. The data implied the presence of water microclusters permeating through [hmim][PF6]-SILM to assist the proton transfer. This mechanism could not be assumed in the case of [NTf2]− containing IL. Ion transport numbers of K+, Na+, and H+ showed that the IL with [PF6]− anion could be beneficial in terms of reducing ion transfer losses in MFCs. Moreover, the conductivity of [bmim][PF6]-SILM at low electrolyte concentration (such as in MFCs) was comparable to Nafion.

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